I unfortunately lost my container data (luckily I only have a couple set up).

To get the fix though, I had to opt in to the Firefox studies. Apparently I had opted out at some point in the past.

Probably when they stealth installed an extension to promote Mr. Robot without telling you.

I caught that before it was posted in the news, and it really disturbed me to see it. "MY REALITY IS DIFFERENT THAN YOURS" or whatever it said. What's that about, talk about unprofessional. That and removing Live Bookmarks really degraded my trust, this weird Pocket thing (seems like a feature, not a product, and one that should've been built from scratch to maximize uniqueness), and I've been using Firefox and only Firefox since 2002. They're definitely losing me over time, it's the community that saves Firefox. Mozilla enables that but shouldn't really get credit for it.

Currently testing out "Edgium" though, and I can already say it's the one browser that could pull me away.

I'm a relatively recent Firefox user (within the past few months), so that was far before I switched over.

Opt back out if you haven't already.

I don't think containers are supported on Android.

But it did take a few days for the Android fix to be released on Google Play, so it was more annoying than on the desktop.